Nose and Sinus Disorders in Infants and Children

1. THE 2-MINUTE PHYSIOLOGY (Rapid Pathophysiology)

• Button Battery Tissue Necrosis: A button battery lodged in the nasal cavity creates a closed electrical circuit against the moist nasal mucosa. The negative pole of the battery acts as the anode, rapidly generating hydroxide ions (OH-). This concentrated alkalinity induces severe, localized liquefactive necrosis . If the negative pole is directed medially, it can cause catastrophic, irreversible destruction of the septal cartilage in as little as 4 hours .
• Magnetic Ischemic Necrosis: If two magnets (or a magnet and a metallic object) are inserted into bilateral nares, they compress the nasal septum between them. Unlike the rapid chemical burn of a battery, this causes a mechanical ischemic pressure necrosis that evolves over several weeks .
• Septal Hematoma: The nasal septal cartilage is avascular and relies entirely on the overlying mucoperichondrium for its blood and nutrient supply. Trauma causing blood to pool between the cartilage and the perichondrium (a septal hematoma) physically separates the cartilage from its blood supply, leading to rapid ischemic avascular necrosis of the septum.

2. THE BEDSIDE ACTION PLAN (Rapid ER Management)

• Nasal Foreign Body Extraction:
• Preparation: Ensure you have the appropriate extraction tools at the bedside before attempting removal: a right-angle probe, suction, and alligator forceps.
• Execution: For non-spherical objects, use alligator forceps. For smooth or round objects (like a plastic bead), use a right-angle probe, passing it behind the object and pulling forward.
• Contraindications: Do not attempt to displace the foreign body posteriorly, and do not blow air into the contralateral naris to dislodge the object, as these maneuvers increase the risk of aspiration or worsening impaction.
• Pediatric Epistaxis:
• Initiate direct, sustained external pressure (pinching the nasal alae).
• If bleeding persists, administer a topical vasoconstrictor such as oxymetazoline spray.
• If refractory to topical therapy and pressure, proceed to anterior nasal packing.

3. THE DIAGNOSTIC GRID (Differential Diagnosis & Workup)

• Top "Can't-Miss" Mimics:
• Button Battery vs. Inert Foreign Body: An inert object (like a bead) causes local irritation, while a button battery causes rapid liquefactive necrosis . Any unilateral, foul-smelling, mucopurulent discharge is a foreign body until proven otherwise.
• Septal Hematoma vs. Simple Nasal Fracture: A simple fracture causes swelling of the nasal bridge, whereas a septal hematoma presents as a boggy, fluctuant mass on the septum itself.
• CSF Rhinorrhea vs. Viral Rhinitis: Clear, watery discharge following facial trauma must heighten suspicion for a cribriform plate or basilar skull fracture causing cerebrospinal fluid (CSF) rhinorrhea.
• Prioritized Diagnostic Workup:
• Physical Exam: The cornerstone of diagnosis for foreign bodies and septal hematomas. Use a nasal speculum and adequate lighting. Always meticulously examine the contralateral naris once a foreign body is identified.
• Radiography: Plain films can be utilized to identify radiopaque foreign bodies (like button batteries or magnets), though many objects (plastic, food) are radiolucent and require clinical diagnosis .

4. THE VISUAL BOARD (ECG / POCUS / Imaging)

• The Foreign Body Exam: Look specifically for unilateral mucopurulent discharge, which is the classic physical presentation of a retained nasal foreign body .
• The Sinusitis Exam: In acute bacterial rhinosinusitis, look for exquisite tenderness upon palpation or percussion over the frontal sinuses (forehead) and the maxillary sinuses (adjacent to the nose), which may be accompanied by fever and worsening symptoms when the patient leans forward.
• The Septal Exam: After any facial or nasal trauma, the resident must explicitly visualize the nasal septum to rule out a septal hematoma (a dark red, bluish, or pale fluctuant swelling that obstructs the nasal passage).

5. THE SCORING MATRIX (Risk Stratification & Guidelines)

• The IDSA Bacterial Rhinosinusitis Guidelines: To distinguish between a standard viral upper respiratory infection and acute bacterial rhinosinusitis (ABRS), apply the Infectious Diseases Society of America (IDSA) criteria.
• Cutoffs for Antibiotic Initiation: Symptoms must persist for >10 days without clinical improvement, OR present with severe symptoms (fever >39°C/102.2°F and purulent discharge) for at least 3-4 consecutive days, OR exhibit a "double-sickening" pattern (worsening of symptoms after initial improvement).

6. THE DANGER ZONE (Pitfalls & Critical Actions)

• The Button Battery Pitfall: Assuming a metallic intranasal object is benign. Critical Action: Button batteries must be removed immediately. Damage is most severe if the negative pole is facing the septum, as it causes alkaline tissue necrosis in as little as four hours .
• The Septal Hematoma Trap: Discharging a pediatric patient with a "simple" nasal fracture without performing an internal speculum exam. Critical Action: You must actively rule out a septal hematoma in all nasal trauma. Failure to incise and drain it will lead to irreversible cartilage destruction and a permanent "saddle nose" deformity.
• The Wrong Tool Trap: Attempting to extract a smooth, round object with alligator forceps. Critical Action: Using forceps on a round object (like a bead) will often push it further into the nasal cavity or airway. You must use a right-angle probe or suction.

7. MCQ MASTERCLASS (Written Exam Tips)

• The "Unilateral Discharge" Buzzword: If a vignette describes a toddler with a history of unilateral, mucopurulent, foul-smelling nasal discharge, the answer is always Nasal Foreign Body .
• The Pathophysiology Distractor: Questions will test the mechanism of button battery burns. Distractors will claim it is an "acidic burn" or "thermal burn." The correct answer is that the negative pole generates hydroxide ions (OH-), causing alkaline tissue necrosis (liquefactive necrosis) .
• The Refractory Epistaxis Fact: If a patient (typically older, but tests general ENT knowledge) presents with severe, life-threatening epistaxis that fails anterior packing, the source is posterior. The most common vessel tested is the Sphenopalatine artery.

8. THE BOARDROOM SCRIPT (OSCE & Oral Board Tips)

• The Primary Assessment Hook: "Given the child's presentation with unilateral, foul-smelling, mucopurulent discharge, I immediately suspect a retained nasal foreign body. My highest priority is to utilize adequate lighting and a nasal speculum to inspect for a button battery, which is a true surgical emergency."
• The Extraction Articulation: "I visualize a smooth plastic bead in the right naris. I will not use alligator forceps or positive pressure techniques as these risk posterior displacement and airway compromise. I will immobilize the child, prepare my suction, and use a right-angle probe to slip behind the object and pull it anteriorly."
• The Trauma Pivot: "The patient sustained direct blunt trauma to the nose. While I will order plain films to evaluate for a fracture and assess for CSF rhinorrhea, my mandatory critical action is a bilateral internal speculum exam to rule out a septal hematoma, which requires immediate incision and drainage to prevent cartilage necrosis."